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Market analysis | to promote the quality of steel structure housing, the cost will come down

"Vigorously develop steel structure and prefabricated buildings", steel structure housing is indispensable. Every year, the construction of urban housing and indemnificatory housing accounts for more than 70% of the new building area. We should improve the performance and quality of the steel structure housing market through technological innovation.


After 20 years of R & D and promotion, the steel structure housing has made some achievements, forming a structure system with Chinese characteristics, enclosure board, supporting parts production and management system. In the absence of technical experience and industrial environment, there are a number of large-scale and influential demonstration projects. It is understood that since 2017, there have been two domestic steel structure residential projects with a scale of more than 1 million square meters, 13 steel structure residential projects with a total construction area of more than 4.6 million square meters.


However, it should also be noted that the application of steel structure housing is not satisfactory. "There are many problems of fire prevention and corrosion protection", "steel structure is not suitable for housing construction", "high cost and poor quality of steel structure housing" and so on have been controversial issues in the industry, and the government and consumers have "doubts" about the quality.


At present, it is a fact that the cost of steel structure residential buildings under construction is on the high side. Some steel structure residential buildings put into use have left developers and consumers with high cost, poor project progress, immature supporting materials and other criticisms, which make steel structure residential buildings good or not.


Although there are some problems in the steel structure residence, I think that we can't kill the steel structure residence with one stick. If we don't do well at present, we can't do well in the future. If we have problems, we can solve them, we can't enlarge the problems and generalize them. From the application in developed countries to the requirements of ecological protection, construction industry transformation and anti-seismic and disaster prevention at this stage, China's steel structure housing is far from the goal and level of development.


At present, the most important thing is to strengthen confidence, implement the guiding opinions on vigorously developing prefabricated buildings, through the collaborative research and development of design, production and construction units, identify problems, through technical innovation, improve the performance and quality of steel structure housing, and reduce the cost of steel structure housing. This is the fundamental way to solve the problem.


How to improve the quality?


In September 2017, the Central Committee of the Communist Party of China and the State Council issued the guiding opinions on carrying out quality improvement actions, which is an important turning point for the promotion of prefabricated buildings. For steel structure housing, the government pays attention to it, the market expects it, and the consumers put forward higher requirements. We must face up to the problems and improve the quality. Therefore, the industry should pay attention to the following five problems:


First, adhere to quality as the core. Without quality, there will be no steel structure housing. We should put the relationship between quality and interests in order. Housing is the carrier for people to realize a better life and improve the quality of life. It is a building product related to the happiness and safety of thousands of families. We must put quality first. According to the characteristics of steel, fire prevention and corrosion prevention should be done to ensure the safety of the structure; according to the whole life of the house, reliable structure, wall material, supporting parts and reliable connection process and sealing materials should be selected to make the steel structure residents comfortable and assured.


Second, strictly control the project acceptance. For the steel structure residence, the traditional construction organization cannot be followed. The construction personnel shall have the technical quality and post training, strengthen the quality control of the processing, welding and installation of the steel beam and column components of the residence; the quality control of the whole process of the processing, transportation and installation of the components, the implementation of the site welding, material acceptance, quality of key parts and responsibility system are the basic requirements of the assembly construction. In the future, the trend of steel structure residence should be the delivery and inspection of finished houses with integrated decoration, and the producers should build houses according to their own living standards.


Third, material technology upgrading. According to the overall requirements of the residence, research and develop a complete set of technical system, not only focus on the structure, but also continuously improve the connection and installation process of wallboard, doors and windows, pipelines and components, and improve the integration level of various functional systems of the residence. Different from the physical and chemical indexes of the same structure and enclosure materials, reliable connection and sealing technology, material compatibility and durability technology are difficult problems. We should adhere to the problem orientation and solve the connection problem between steel and cement-based materials. From the current quality problems, most of them are the joints between plates, plates and columns, plates and beams. The fundamental solution is material upgrading.


Fourth, focus on detail quality. When the steel structure residence is handed over for inspection, the residents pay more attention to the exposed parts such as decorative materials, doors, windows and pipelines, insist on being responsible for the residents, strictly check the reliability and durability of various joints, slab joint treatment and sealing materials, and insist on making the details precise; as an industrial product, the steel structure residence should be provided to the users together with the residence instruction manual, and at the same time, it should be handed over to the builder solemnly Promise. In this respect, we should learn from Japan's advanced humanized design concept, the concept of green environmental protection, the concept of comfort and safety, and build high-quality products with the patience and care of craftsmen.


Fifth, the pursuit of reliability and durability. For steel structure housing, it is not necessary to pursue a high level of digitalization and intelligence, but it must meet the most basic use function and performance requirements of the common people. If the quality of housing is not good, there are some problems such as falling off of decoration materials, poor insulation and sound insulation, which will cause harm to the promotion of steel structure housing. At present, some projects are very suitable for the use of steel structure system, but it is often the owners who finally decide to give up, the price is not the decisive factor, and the basic reason is to worry about the quality of finished products.


Cost should be reduced

Steel structure house is more important than traditional construction house


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